Automated storage and retrieval system structure

ABSTRACT

An automated storage and retrieval system includes an autonomous rover and a multilevel rack structure. The multilevel rack structure includes columns connected by rail beams transversely spanning between the columns. The rail beams define storage and transport levels and provide riding surfaces for the autonomous rover. The rail beams include integral fatigue resistant rover location apertures.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a non-provisional of and claims the benefit of U.S.provisional patent application No. 61/780,363 filed on Mar. 13, 2013,the disclosure of which is incorporated herein by reference in itsentirety.

BACKGROUND

1. Field

The exemplary embodiments generally relate to material handling systemsand, more particularly, to the structure of a storage and retrievalsystem.

2. Brief Description of Related Developments

Material handling systems such as, for example, automated storage andretrieval systems, cycle storage items to storage locations (e.g.shelves of a storage rack) in a storage array of an automated warehouseor store. Storage racks with dynamically allocated storage locations mayexpect to be subject to a higher number of load cycles during a lifespan/term of the automated storage and retrieval system, because of thehigher usage rate of each potential storage location, when compared toconventional storage racks (where storage locations are fixed atpredetermined locations of the shelves). Conventional storage structureshave generally neglected fatigue concerns, and to the limited extentfatigue loads have been incorporated into the design of the conventionalstorage structure, such loads appear to be related to gross storageloads on the structure, rather than loading from automation (e.g. loadsfrom automated material handlers with various payloads traversing thestorage structure or payload transfer actions).

Also, conventional automated storage and retrieval systems may providefor the scanning of items after a seismic or other event that may causemovement of the stored items. Automation may be used to determine theposition of the affected storage items so that the items can be moved totheir correct positions. Generally, this scanning is done to facilitaterecovery of the automated storage and retrieval system once theautomated storage and retrieval system is shut down as a result of theseismic or other event.

It would be advantageous to have a storage structure that incorporatesfatigue considerations with respect to loading from automation of theautomated storage and retrieval system. It would also be advantageous tohave a storage structure that facilitates maintaining operation after aseismic or other event that may cause movement of the stored items.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing aspects and other features of the disclosed embodiment areexplained in the following description, taken in connection with theaccompanying drawings, wherein:

FIG. 1 is a schematic illustration of an automated storage and retrievalsystem in accordance with aspects of the disclosed embodiment;

FIGS. 2, 3A and 3B are schematic illustrations of a portion of a storagerack of the automated storage and retrieval system in accordance withaspects of the disclosed embodiment;

FIG. 4A-4D are schematic illustrations of a rover travel rail inaccordance with aspects of the disclosed embodiment;

FIG. 5 is a schematic illustration of a portion of the automated storageand retrieval system in accordance with aspects of the disclosedembodiment;

FIG. 6 is a schematic illustration of a rover travel rail mountingbracket in accordance with aspects of the disclosed embodiment;

FIGS. 7, 8 and 9 are schematic illustrations of a portion of theautomated storage and retrieval system in accordance with aspects of thedisclosed embodiment;

FIGS. 10, 11A-11C, 12A-12B and 13 are schematic illustrations ofportions of a compliant interface in accordance with aspects of thedisclosed embodiment; and

FIGS. 14A-14C are schematic illustrations of a rover charging contact inaccordance with aspects of the disclosed embodiment.

DETAILED DESCRIPTION

FIG. 1 is a schematic illustration of an automated storage and retrievalsystem in accordance with aspects of the disclosed embodiment. Althoughthe aspects of the disclosed embodiment will be described with referenceto the drawings, it should be understood that the aspects of thedisclosed embodiment can be embodied in many forms. In addition, anysuitable size, shape or type of elements or materials could be used.

In accordance with aspects of the disclosed embodiment the automatedstorage and retrieval system 100 may operate in a retail distributioncenter or warehouse to, for example, fulfill orders received from retailstores for case units such as those described in U.S. patent applicationSer. No. 13/326,674 filed on Dec. 15, 2011, the disclosure of which isincorporated by reference herein in its entirety.

The automated storage and retrieval system 100 may include in-feed andout-feed transfer stations 170, 160, input and output vertical liftmodules 150A, 150B (generally referred to as lift modules 150), astorage structure 130, and a number of autonomous rovers 110. Thestorage structure 130 may include multiple levels of storage rackmodules where each level includes respective storage or picking aisles130A having rover travel surfaces (as will be described below), andtransfer decks 130B for transferring case units between any of thestorage areas (e.g. disposed on storage shelves 130S located on one ormore sides of the picking aisles 130A) of the storage structure 130 andany shelf of the lift modules 150. The storage aisles 130A, and transferdecks 130B are also configured to allow the rovers 110 to traverse thestorage aisles 130A and transfer decks 130B for placing case units intopicking stock and to retrieve ordered case units.

The rovers 110 may be any suitable autonomous vehicles capable ofcarrying and transferring case units throughout the storage andretrieval system 100. In one aspect the rovers 110 may be automated,independent (e.g. free riding) rovers. Suitable examples of rovers canbe found in, for exemplary purposes only, U.S. patent application Ser.No. 13/326,674 filed on Dec. 15, 2011; U.S. patent application Ser. No.12/757,312 filed on Apr. 9, 2010; U.S. patent application Ser. No.13/326,423 filed on Dec. 15, 2011; U.S. patent application Ser. No.13/326,447 filed on Dec. 15, 2011; U.S. patent application Ser. No.13/326,505 Dec. 15, 2011; U.S. patent application Ser. No. 13/327,040filed on Dec. 15, 2011; U.S. patent application Ser. No. 13/326,952filed on Dec. 15, 2011; and U.S. patent application Ser. No. 13/326,993filed on Dec. 15, 2011, the disclosures of which are incorporated byreference herein in their entireties. The rovers 110 may be configuredto place case units, such as the above described retail merchandise,into picking stock in the one or more levels of the storage structure130 and then selectively retrieve ordered case units for shipping theordered case units to, for example, a store or other suitable location.

The rovers 110, lift modules 150 and other suitable features of thestorage and retrieval system 100 may be controlled by, for example, oneor more central system control computers (e.g. control server) 120through, for example, any suitable network 180. The network 180 may be awired network, a wireless network or a combination of a wireless andwired network using any suitable type and/or number of communicationprotocols. In one aspect, the control server 120 may include acollection of substantially concurrently running programs that areconfigured to manage the storage and retrieval system 100 including, forexemplary purposes only, controlling, scheduling, and monitoring theactivities of all active system components, managing inventory andpickfaces, and interfacing with the warehouse management system 2500.

Referring now to FIGS. 2, 3A and 3B, as noted above, the storagestructure 130 may include a multilevel storage structure including anarray of stacked storage locations. Each array may include verticalsupport members 200 to which rover travel rails 201A-201 n (generallyreferred to as rover rails 201) are fixed. The rover rails 201 maydefine storage levels and transport levels. The rover rails 201 may forma riding surface for the rover 110 to travel along through, for example,the picking aisles 130A or any other suitable location of the automatedstorage and retrieval system. The rover rails 201 may support the roverwithin, e.g., the picking aisles 130A during payload transfer betweenthe rover 110 and the storage locations. Accordingly, the rover rails201 may be subject to static and cyclic loads from rover 110 activityincluding the rover traversing the picking aisles 130A to and from rackstorage locations, transferring payloads to and from storage locations(which may include pickface building at the shelf). Cyclic loading onthe rover rails 201 may create fatigue conditions that may be amplifiedby dynamic storage distribution (as described in, e.g., U.S. patentapplication Ser. No. 12/757,337 filed on Apr. 9, 2010 the disclosure orwhich is incorporated herein by reference in its entirety) along theaisles. As such, the rover rails 201 may include or otherwiseincorporate fatigue resistant features corresponding to any suitablepredetermined lifetime loading of the rover rails 201. The fatigueresistant features may be configured so that a stress at or surroundingthe fatigue resistant features is below a predetermined value.

The rover travel rails 201 may be fixed to the vertical support members200 in any suitable manner. In one aspect the rover rails 201 may befixed to the vertical support members using any suitable upper mountingbracket 202U and any suitable lower mounting bracket 202L. In anotheraspect, the rover rails 201 may be fixed to the vertical support members200 with an adjustable mounting bracket in a manner similar to thatdescribed below with respect to FIG. 6. Here the mounting brackets 202U,202L each have an angle iron shape (e.g. an “L” shape) but in otheraspects the mounting brackets 202U, 202L may have any suitable shape andbe constructed of any suitable material. The mounting brackets 202U,202L may be fixed to the vertical support members 200 using any suitablefasteners including but not limited to rivets, bolts, clips, screws,snaps, welding or any other suitable mechanical and/or chemicalfasteners or adhesives. The rover rails 201 may be fixed to the mountingbrackets 202U, 202L in any suitable manner such as in a mannersubstantially similar to that described above between the mountingbrackets 202U, 202L and the vertical support members 200.

Referring now to FIGS. 4A-4D each of the rover rails 201 may be, forexample, one piece members of unitary construction formed by anysuitable manufacturing process such as cold rolling. The rover rails maybe disposed on opposite lateral sides of a picking aisle 130A and extendlongitudinally along a length of the picking aisle 130A for allowing therover 110 to travel along the length of the picking aisle 130A. Therover rails 201 may have any suitable length such that in one aspect,the rover rails 201 have a length substantially equal to a length of arespective picking aisle 130A, while in other aspects the rover rails201 are placed end to end for spanning a length of the respectivepicking aisle 130A. The rover rails 201 may include a fatigue resistantvertical profile portion 400. The vertical profile portion 400 may haveany suitable shape such as, for example, a closed box section with oneor more axis of symmetry that provides static and dynamic stability. Thevertical profile portion 400 may define or otherwise include flanges401, 402 for, e.g., fastener engagement to the vertical support members200 and/or the storage shelves 130S (FIG. 1). The flanges 401, 402 maybe referred to as upper and lower flanges respectively. The upper andlower flanges 401, 402 may include fatigue resistant apertures 406through which suitable fasteners, such as those described above, areinserted for fixing the respective mounting brackets 202U, 202L to therover rail 201 in any suitable manner. The upper flange 401 may alsoinclude fatigue resistant apertures 407 through which suitablefasteners, such as those described above, are inserted for fixing thestorage shelves 130S to the rover rail 201 in any suitable manner.

The one piece rover rail 201 may also define a fatigue resistant flange403 that extends from a face 404 of the vertical profile portion 400 andprovides a travel/riding and support surface 403S for, e.g., wheels ofthe rover 110 during rover operation. The flange 403 may have anysuitable width W for allowing, e.g., wheels of the rover to travel alongthe flange 403. The face 404 may also include integral rover positiondetermination features 405. The integral rover position determinationfeatures 405 may have any suitable shape and size such that the roverposition determination features 405 are fatigue resistant. In one aspectthe integral rover position determination features 405 may be aperturesor protrusions formed in the face 404 having a shape and size forminimizing stress concentrations in the face 404. The integral roverposition determination features 405 are illustrated as having a generalrectangular shape but in other aspects the integral rover positiondetermination features 405 may have any suitable shape. In one aspectthe rover 110 may include any suitable sensors for detecting the roverposition determination features 405 and determine its position along thepicking aisle 130A based on at least the rover position determinationfeatures 405. In other aspects the position of the rover 110 within thepicking aisle may be determined in any suitable manner. One example ofdetermining the position of the rover can be found in U.S. patentapplication Ser. No. 13/327,035 entitled “Bot Position Sensing” andfiled on Dec. 15, 2011, the disclosure of which is incorporated hereinby reference in its entirety.

Referring now to FIG. 5 one or more structural components of theautomated storage and retrieval system 100 (such as the transfer deck130B, picking aisles 130A, lift modules 150, etc.) may have transportsections, upon which the rover 110 travels, with different flexure,static and dynamic properties such that one or more of the structuralcomponents reacts differently to, e.g., a seismic event or other event(generally referred to as a seismic event) that may cause movement ofitems within their respective storage locations. A compliant interface500 between the structural components may allow for relative movement ofthe structural components during the seismic event. The compliantinterface 500 may be self-aligning following the seismic event andprovide a riding surface over which the rover 110 can transition betweenthe transport sections of the different structural components. It isnoted that the compliant interface 500 will be described with respect toa transition between the lift module 150 and transfer deck 130B but itshould be understood that the interface described herein may be placedat a transition between any two structural components of the automatedstorage and retrieval system. For example, the compliant interface 500may provide a transition between one or more of a picking aisle 130A andthe transfer deck 130B, between a picking aisle 130A and a lift module150 (e.g. where the picking aisle provides substantially direct accessto the lift module), and/or between any other suitable structures of theautomated storage and retrieval system 100.

In one aspect the lift modules 150 (a portion of which is shown in FIG.5) may be modular. For example, each lift module 150 may include avertical lift portion (not shown) and a rover interface portion 150Rwhich can be mated to, for example, the transfer deck 130B in anysuitable manner. In one aspect each lift module 150 may include verticalsupports 510. The vertical lift portion (not shown) may be coupled tothe vertical supports 510 in any suitable manner. Rover rails 501, 501Xmay also be fixed to the vertical supports 510 at vertical intervalscorresponding to each storage level of the automated storage andretrieval system 100. Each of the rover rails 501, 501X may besubstantially similar to rover rails 201 described above and includerover travel/riding and support surface 501S, however one or more ofrover rails 501, 501X may include recessed or cut out portions 501XRthat provide clearance for an end effector 110E of the rover 110 toextend for interfacing with a transfer shelf of the vertical liftportion for transporting items between storage levels or into/out of thestorage structure 130. The rover rails 501, 501X may be disposed onopposite lateral sides of a lift travel aisle 150T and extendlongitudinally along a length of the lift travel aisle 150T.

Also referring to FIG. 6 the rover rails 501, 501X may be substantiallyrigidly fixed to the vertical supports 510 in any suitable manner. Inone aspect the rover rails 501, 501X may be adjustably fixed to thevertical supports 510 through adjustable mounting members 600. Themounting member 600 may allow three degree of freedom adjustment of eachrespective rover rail 501, 501X. In other aspects the mounting members600 may provide adjustment of the respective rover rail along anysuitable number of linear and/or rotational axes. The mounting member600 may allow for alignment of the respective rover rail 501, 501X withthe transfer deck 130B and/or other platforms on which the rovertravels. Each direction of adjustment of the mounting member 600 mayhave a locking mechanism for fixing the respective direction and rigidlysecuring the rover rail 501, 501X to, for example, the vertical supports510.

In one aspect each mounting member 600 includes a first support plate601 that interfaces with, for example, vertical support 510 in anysuitable manner for securing the first support plate 601 to the verticalsupport member 510. The first support plate 601 may include elongatemounting apertures 620 through which fasteners may be inserted forsecuring the first support plate 601 to the vertical support 510. Thefirst support plate 601 may be movable relative to, for example, thevertical support 510 or other suitable feature of the automated storageand retrieval system 100, in the X direction. Locking members 601A mayreleasably engage the vertical support 510 for substantially preventingmovement of the first support plate 601 in the X direction. A secondsupport plate 602 may also include elongate mounting apertures 621 andbe movably mounted to the first support plate 601 in any suitable mannerso that the second support plate 602 is movable relative to the firstsupport plate 601 (or other suitable feature of the automated storageand retrieval system 100) in the Z direction. Locking members 602A mayreleasably engage the first support plate 601 for substantiallypreventing movement of the second support plate 601 in the Z direction.A third support plate 603 may also include elongate mounting apertures622 and be movably mounted to the second support plate 602 in anysuitable manner so that the third support plate 603 is movable relativeto the second support plate 602 (or other suitable feature of theautomated storage and retrieval system 100) in the Y direction. Lockingmembers 603A may releasably engage the second support plate 602 forsubstantially preventing movement of the third support plate 603 in theY direction. It is noted that the X, Y and Z axes are used forexplanatory purposes only and that each of the first, second and thirdsupport plates 601, 602, 603 may be movable along any suitablerespective axis in any suitable reference frame.

Referring now to FIGS. 7-10, the rover travel/riding surfaces of theautomated storage and retrieval system (e.g. such as surfaces 501S, 403Sof the rover rails 201 and the surface of the transfer deck 130B) may beisolated from one another with one or more intermediate or compliantisolation plates 700 that are robust and long lasting. These isolationplates 700 are also shown in FIG. 5 between each lift module 150 rail501, 501X and the transfer deck 130B (only a portion of which is shownin the Figs.) for isolating the rails 501, 501X from the transfer deck130B. The isolation plates may also provide the complaint interface 500,which is formed of a jointed or articulated connection that is releasedto provide at least one degree of freedom of movement between, e.g., thetransfer deck 130B and lift module 150 rails 501, 501X as will bedescribed below. The compliant interface 500 may substantially preventchafing between automated storage and retrieval system structuralelements. While the isolation plates 700 are shown as being located atthe interface between the rails 501, 501X and the transfer deck 130B itshould be understood, however, that these isolation plates 700 may belocated at any structural joint between any two adjacent rover transportsurfaces. The joint elements (which will be described below) of thecompliant interface 500 form a substantially continuous and smoothsurface upon which the rover 110 travels between the different portionsof the automated storage and retrieval system 100.

As can be seen in FIGS. 7-10 in one aspect the isolation plates 700 mayinclude more than one isolation plate 700 such that each interface 500at, e.g. the rails rail 501, 501X has a respective isolation plate 700.In other aspects the isolation plates may be a single, one piece plate800 such that each interface 500 at the rails 501, 501X has a commonisolation plate 800. The isolation plates 700, 800 may be constructed ofany suitable material and have any suitable configuration. In one aspectthe isolation plates 700, 800 and the rails 501, 501X may each includefingers 700F, 501F that interleave with each other or other suitablestructure, such as flexible membranes and/or slip plates, that allow formovement between the plates 700, 800 and rails 501, 501X and areconfigured to provide or otherwise include a riding surface for a rover110 passing over the compliant joint 500. In one aspect as can be seenin FIG. 10 the fingers of the isolation plates 700, 800 may includetapered sides 700A1, 700A2 and/or a tapered end 700E or any othersuitable alignment features to assist in the recovery of the compliantjoint 500 after a seismic event or other movement of the automatedstorage and retrieval system structure. As may be realized the fingers501F of the rails 501, 501X may be tapered in a complimentary manner tothat of the fingers 700F to also assist in the recovery of the compliantjoint 500 after a seismic event or other movement of the automatedstorage and retrieval system structure.

Referring also to FIGS. 11A-11C, the isolation plates 700, 800 may besubstantially stiff members that are coupled to the transport deck 130B(or other suitable member within the automated storage and retrievalsystem such as any rover transport surface or isolation plate supportmembers or bars 130M) to allow for at least one degree of freedom ofmovement between the transport deck 130B and, for example, rover rails501, 501X (or other rover transport/riding surface). In one aspect theisolation plates 700, 800 may be mounted to provide three or moredegrees of freedom of movement (e.g. X, Y, Z and/or rotation about oneor more of the X, Y and X axes). The isolation plates 700, 800 may bemounted in any suitable manner that allows compliant movement of theisolation plate 700, 800. In one aspect a ball type joint (as will bedescribed below) or any other suitable articulated joint may be used tomount the isolation plate 700, 800 to any suitable support surface. Forexample, the transfer deck 130B (or any other suitable structuralelement of the automated storage and retrieval system) may include aslot or other aperture, as will be described below, in which a ball isdisposed and the isolation plate may be mounted to the ball (e.g. so aball and socket joint is formed).

The isolation plates 700 (isolation plate 800 may be mounted andfunction in a manner substantially similar to that described herein forisolation plates 700) may be mounted to, for example, any suitableportion of the transfer deck 130B such as support member 130M in anysuitable manner. In one aspect the isolation plate 700 may be mounted tothe support member 130M with a ball joint or otherwise articulatedconnection that allows pivotal movement of the isolation plate as willbe described in greater detail below. Each isolation plate 700 mayinclude apertures 11001 through which any suitable fasteners 11002 areinserted. The support member 130M may include elongated apertures11000A, 11000B through which the fasteners 11002 pass such that theisolation plate is disposed on a first or upper side of the supportmember 130M. A ball member 11003 may be placed over the fastener from asecond or bottom side of the support member 130M so that the ball member11003 is located within a respective aperture 11000A, 11000B. The ballmember 11003 may have any suitable diameter that allows pivotingmovement within and linear movement of the ball member 11003 along alength of the aperture 11000A, 11000B. A bushing or spacer member 11004may be inserted within the ball member 11003 to substantially preventcontact between the fastener 11002 and the ball member 11003 and tosubstantially prevent deformation of the ball when a retaining member11006 is affixed to the fastener for retaining the ball member 11003within the aperture 11000A, 11000B. In one aspect the fastener 11002 isa screw and the retaining member 11006 is a nut but in other aspects anysuitable elongated member and retaining members may be used such as, forexample rods and clips, snaps and/or pins. A washer or othersubstantially flat or obstructive member 11005 may be placed between theretaining member 11006 and the ball member 11003. The obstructive member11005 may have a diameter or may otherwise be larger than a width of theaperture 11000A, 11000B so as to substantially prevent the ball member11003 and retaining member 11006 from passing through the aperture11000A, 11000B such that the isolation plate 700 is restrained frombeing lifted from the support member 130M. In other aspects theretaining member 11006 may be configured to both retain the ball member11003 on the fastener 11002 and substantially prevent the lifting of theisolation plate 700 from the support member 130M. As can be seen in FIG.11B the aperture 11000A, 11000B may include a recess on the second sideof the support member 130M into which the retaining member 11006 andobstructive member 11005 are disposed. In other aspects the aperture11000A, 11000B may not include a recess.

Referring now to FIGS. 11C, 12A and 12B the interleaved fingers 700F,501F (FIG. 9) may substantially prevent movement of the isolation plate700 in, for example, the X direction while allowing relative movement ofthe isolation plate 700 and the rails 501, 501X in the Y direction. Theelongated apertures 11000A, 11000B, however, may allow movement of theisolation plate 700 relative to, for example, the support member 130Mand transfer deck 130B in the X direction but may not allow relativemovement between the isolation plate 700 and the transfer deck130B/support member 130M in the Y direction. For example, the ballmember, as noted above, may move along the length of the slot allowingthe isolation member to move relative to the support member 130M andtransfer deck 130B. In other aspects the isolation plate 700 may bemounted such that linear movement within the slot is fixed (e.g. theisolation plate substantially does not move along a length of the slot).As such, the combination of the interleaved fingers 700F, 501F and theelongated apertures 11000A, 11000B/ball joint provide relative movementbetween the transfer deck 130B and the rails 501, 501X in at least boththe X and Y directions.

Further degrees of freedom of movement are provided by the ball jointsuch that the isolation member 700 is allowed to pivot about the ballmember 11003 within the elongated aperture 11000A, 11000B (generallyreferred to as elongated apertures 11000). Referring to FIGS. 12A and12B relative movement between, for example, the transfer deck 130B andthe lift module 150 rover transport/riding surfaces in the Z directionmay cause pivoting movement of the isolation member 700 about the balljoint in the direction of arrow 12000. For example, as noted above, theball member 11003 may allow the isolation member 700 to pivot relativeto the support member 130M (and the transfer deck 130B). As the transferdeck 130B and the lift module 150 rover transport/riding surfaces moverelative to one another in the Z direction so that the riding surface501S of the rover rails 501, 501X (FIG. 5) is located above the transferdeck riding surface, the isolation plate 700 contacts the fingers 501Fcausing the isolation member fingers 700F (and the isolation plate as awhole) to pivot upwards as shown in FIG. 12A. As the transfer deck 130Band the lift module 150 rover transport/riding surfaces move relative toone another in the Z direction so that the riding surface 501S of therover rails 501, 501X (FIG. 5) is located below the transfer deck ridingsurface, e.g., the cantilevered weight of the isolation plate 700 causesthe isolation plate to pivot downwards as shown in FIG. 12B. It is notedthat the ball joint between the isolation member 700 and the supportmember 130M may also allow for substantially pure Z axis motion where aspace SPC is provided between the obstructive member 11005 and a surface11000S of the elongated aperture 11000. It is noted that a supportmember 12030 may be fixed to the rails 501, 501X below the fingers 501Fto at least substantially prevent flexure (e.g. in combination with theinterleaved fingers) of one or more of the fingers 501F and isolationplate 700 as the rover 110 travels over the rover riding surface formedby the compliant interface. In other aspects the rails 501, 501X may notinclude the support member 12030.

Referring to FIG. 13 one or more lead-ins or guides 13000A, 13000B maybe fixed to the lift module 150 rails 501, 501X at a proximate end ofthe guides 13000A, 13000B in any suitable manner for guiding the rover110 into the lift module 150. The guides 13000A, 13000B may form afunnel like passage, the width of which is narrower at the rails 501,501X than at the mouth of the passage (e.g. at the distal ends of theguides 13000A, 13000B). In one aspect each of the guides 13000A, 13000Bmay have a single, one piece or unitary construction while in otheraspects each guide may be constructed of multiple pieces that are fixedto one another in any suitable manner such as welding or throughmechanical or chemical fasteners. The guides may be positioned above therover transport/riding surface of the transfer deck 130B so that theguides 13000A, 13000B are able to move with the lift module rails 501,501X relative to the transfer deck 130B substantially free from contactwith the transfer deck 130B.

Referring now to FIGS. 7 and 14A-14C the lift module 150 may include arover charging station 14000 fixed to the rails 501, 501X and/orvertical supports/columns 510 of the lift module so that the chargingstation 14000 moves with the lift module 150 during, for example, aseismic event. In other aspects the charging station 14000 may bedisposed at any suitable location within the automated storage andretrieval system. Suitable examples of rover charging stations can befound in, for example, U.S. patent application Ser. No. 13/326,823entitled “Autonomous Transport Vehicle Charging System” filed on Dec.15, 2011 and U.S. provisional patent application No. 61/798,282 entitled“Rover Charger System” filed on Mar. 15, 2013 (now U.S. patentapplication Ser. No. 14/209086 filed on Mar. 13, 2014, the disclosuresof which are incorporated herein by reference in their entireties. Thecharging station 14000 may include a contact or charging pad 14000P thatincludes compliant contacts 14001A, 14001B (generally referred to ascompliant contacts 14001). The compliant contacts 14001A, 14001B mayinterface with rover charging contacts 14003A, 14003B (generallyreferred to as rover charging contacts 14003) for charging the rover110. As may be realized, the rovers 110 rest on the lift module 150rails 501, 501X and may move during, e.g., a seismic event. Thecompliant contacts 14001A, 14001B of the charging station 14000 may beconfigured to remain in contact with the rover charging contacts 14003A,14003B during movement of the rover 110 relative to the charging station14000. As can be seen in FIGS. 14A and 14B, each compliant contact 14001may be disposed at least partly within a recess of the charging pad14000P. The compliant contact 14001 may include a contact portion 14010and a shaft portion 14011 connected to the contact portion 14010. Theshaft portion 14011 may be pivotally mounted to the charging pad 14000Pin any suitable manner so that the contact portion 14010 moves in thedirection of arrow 14020. A resilient or biasing member 14012 isdisposed between a surface 14000S of the charging pad 14000P and, forexample, the contact portion 14010 (or any other suitable portion of thecompliant contact 14001) for biasing the contact portion away from thesurface 14000S. As the rover 110 drives onto the charging station 14000the rover charging contact 14003 pushes the contact portion 14010 of thecompliant contact 14001 towards the surface 14000S such that the biasingmember 14012 pushes the contact portion 14010 against the rover chargingcontact 14003. The distance through which the contact portion 14010 ispushed is such that the upward travel of the contact portion 14010 issufficient to allow the contact portion 14010 to remain in contact withthe rover charging contact 14003 during movement of the rover 110relative to the rails 501, 501X during a seismic event. As can be seenin FIGS. 14A and 14B the rover charging contacts 14003, 14003′ may haveany suitable shape and/or configuration to allow for nonbinding contactas the rover charging contact 14003, 14003′ interfaces with thecompliant contact 14001.

In accordance with one or more aspects of the disclosed embodiment anautomated storage and retrieval system is provided. The automatedstorage and retrieval system includes an autonomous rover; and amultilevel rack structure. The multilevel rack structure includescolumns connected by rail beams transversely spanning between thecolumns. The rail beams define storage and transport levels and provideriding surfaces for the autonomous rover. The rail beams includeintegral fatigue resistant rover location apertures.

In accordance with one or more aspects of the disclosed embodiment, theautonomous rover includes sensors for detecting the rover locationapertures.

In accordance with one or more aspects of the disclosed embodiment, therail beam members include fatigue resistant connections for coupling therail beam members to the columns.

In accordance with one or more aspects of the disclosed embodiment anautomated storage and retrieval system having autonomous rovers isprovided. The automated storage and retrieval system includes a firstautomated storage and retrieval section having respective structuraldynamic properties and a first rover support surface upon which theautonomous rovers travel; a second automated storage and retrievalsection having respective structural dynamic properties and a secondrover support surface upon which the autonomous rovers travel; and areleased interface disposed between the first and second rover supportsurfaces. The released interface being configured to allow relativemovement between the first and second rover support surfaces, andprovide an interface support surface upon which the autonomous roverstravel, the interface support surface extending between the first andsecond rover support surfaces.

In accordance with one or more aspects of the disclosed embodiment thereleased interface includes an interface portion connected to one of thefirst or second rover support surface; and at least one movable platemovably connected to another one of the first or second rover supportsurface, the at least one moveable plate and the interface portion beingconfigured to releasably engage one another for providing the interfacesupport surface. In other aspects the interface portion includes firstfingers integrally formed with the one of the first or second roversupport surface and the at least one movable plate includes secondfingers that are interleaved with the first fingers. In still otheraspects the first rover support surface comprises at least one roverguide rail of a vertical lift module and the second rover supportsurface comprises a transfer deck surface. In yet another aspect theinterface portion comprises two interface portions and the at least onemovable plate comprises a movable plate for releasably engaging arespective one of the two interface portions. In still another aspectthe interface portion comprises two interface portions and the at leastone movable plate comprises a single plate for releasably engaging thetwo interface portions. In another aspect the at least one movable plateis movably coupled to the another one of the first or second roversupport surface with at least a two-degree of freedom coupling.

In accordance with one or more aspects of the disclosed embodiment theautomated storage and retrieval system includes at least one verticallift module; and a transfer deck in communication with the at least onevertical lift module; wherein the first automated storage and retrievalsection comprises the at least one vertical lift module and the secondautomated storage and retrieval section comprises the transfer deck. Inanother aspect wherein the at least one vertical lift module includes aframe, rover guide rails, and an adjustable rail mounting bracketcoupling the rover guide rails to the frame. In one aspect theadjustable rail mounting bracket is configured to provide adjustment inthree degrees of freedom. In another aspect the at least one verticallift module comprises a rover charging station including compliantcontacts configured to engage the autonomous rovers.

In accordance with one or more aspects of the disclosed embodiment therespective structural dynamic properties of the first automated storageand retrieval section are different than the respective structuraldynamic properties of the second automated storage and retrievalsection.

In accordance with one or more aspects of the disclosed embodiment anautomated storage and retrieval system having autonomous rovers isprovided. The automated storage and retrieval system includes at leastone vertical lift module having at least one travel surface upon whichthe autonomous rovers travel; a transfer deck in communication with theat least one vertical lift module, the transfer deck including atransfer deck surface upon which the autonomous rovers travel; and areleased interface releasably connecting the at least one travel surfaceand the transfer deck surface, the released interface forming anautonomous rover riding surface extending between the at least onetravel surface and the transfer deck surface.

In accordance with one or more aspects of the disclosed embodiment theat least one vertical lift module includes a frame, and a rail mountingbracket configured to adjustably couple the at least one travel surfaceto the frame.

In accordance with one or more aspects of the disclosed embodiment theat least one vertical lift module comprises a rover charging stationincluding compliant contacts configured to engage the autonomous rovers.

In accordance with one or more aspects of the disclosed embodiment thereleased interface includes an interface portion connected to one of theat least one travel surface or the transfer deck surface; and at leastone movable plate movably connected to another one of the at least onetravel surface or the transfer deck surface, the at least one moveableplate and the interface portion being configured to releasably engageone another and provide the autonomous rover riding surface. In anotheraspect the interface portion includes first fingers integrally formedwith the at least one travel surface or the transfer deck surface andthe at least one movable plate includes second fingers that areinterleaved with the first fingers. In yet another aspect the interfaceportion comprises two interface portions and the at least one movableplate comprises a movable plate for releasably engaging a respective oneof the two interface portions. In still another aspect the interfaceportion comprises two interface portions and the at least one movableplate comprises a single plate for releasably engaging the two interfaceportions. In another aspect the at least one movable plate is movablycoupled to the another one of the at least one travel surface or thetransfer deck surface with at least a two-degree of freedom coupling.

It should be understood that the foregoing description is onlyillustrative of the aspects of the disclosed embodiment. Variousalternatives and modifications can be devised by those skilled in theart without departing from the aspects of the disclosed embodiment.Accordingly, the aspects of the disclosed embodiment are intended toembrace all such alternatives, modifications and variances that fallwithin the scope of the appended claims. Further, the mere fact thatdifferent features are recited in mutually different dependent orindependent claims does not indicate that a combination of thesefeatures cannot be advantageously used, such a combination remainingwithin the scope of the aspects of the invention.

What is claimed is:
 1. An automated storage and retrieval system havingautonomously guided rover vehicles, the automated storage and retrievalsystem comprising: a first automated storage and retrieval sectionhaving respective structural dynamic properties and a first autonomouslyguided rover vehicle support surface upon which the autonomously guidedrover vehicles travel; a second automated storage and retrieval sectionhaving respective structural dynamic properties and a secondautonomously guided rover vehicle support surface upon which theautonomously guided rover vehicles travel; and a released interfacedisposed between the first and second autonomously guided rover vehiclesupport surfaces, the released interface being configured to allowrelative movement between the first and second autonomously guided rovervehicle support surfaces, and provide an interface support surface uponwhich the autonomously guided rover vehicles travel where the interfacesupport surface extends between the first and second autonomously guidedrover vehicle support surfaces.
 2. The automated storage and retrievalsystem of claim 1, wherein the released interface includes an interfaceportion connected to one of the first or second autonomously guidedrover vehicle support surface; and at least one movable plate movablyconnected to another one of the first or second autonomously guidedrover vehicle support surface, the at least one moveable plate and theinterface portion being configured to releasably engage one another forproviding the interface support surface.
 3. The automated storage andretrieval system of claim 2, wherein the interface portion includesfirst fingers integrally formed with the one of the first or secondautonomously guided rover vehicle support surface and the at least onemovable plate includes second fingers that are interleaved with thefirst fingers.
 4. The automated storage and retrieval system of claim 2,wherein the first autonomously guided rover vehicle support surfacecomprises at least one autonomously guided rover vehicle guide rail of avertical lift module and the second autonomously guided rover vehiclesupport surface comprises a transfer deck surface.
 5. The automatedstorage and retrieval system of claim 2, wherein the interface portioncomprises two interface portions and the at least one movable platecomprises a movable plate for releasably engaging a respective one ofthe two interface portions.
 6. The automated storage and retrievalsystem of claim 2, wherein the interface portion comprises two interfaceportions and the at least one movable plate comprises a single plate forreleasablv engaging the two interface portions.
 7. The automated storageand retrieval system of claim 2, wherein the at least one movable plateis movably coupled to the another one of the first or secondautonomously guided rover vehicle support surface with at least atwo-degree of freedom coupling.
 8. The automated storage and retrievalsystem of claim 1, wherein the automated storage and retrieval systemincludes at least one vertical lift module; and a transfer deck incommunication with the at least one vertical lift module; wherein thefirst automated storage and retrieval section comprises the at least onevertical lift module and the second automated storage and retrievalsection comprises the transfer deck.
 9. The automated storage andretrieval system of claim 8, wherein the at least one vertical liftmodule includes a frame, autonomously guided rover vehicle guide rails,and an adjustable rail mounting bracket coupling the autonomously guidedrover vehicle guide rails to the frame.
 10. The automated storage andretrieval system of claim 9, wherein the adjustable rail mountingbracket is configured to provide adjustment in three degrees of freedom.11. The automated storage and retrieval system of claim 1, wherein theat least one vertical lift module comprises a autonomously guided rovervehicle charging station including compliant contacts configured toengage the autonomously guided rover vehicles.
 12. The automated storageand retrieval system of claim 1, wherein the respective structuraldynamic properties of the first automated storage and retrieval sectionare different than the respective structural dynamic properties of thesecond automated storage and retrieval section.
 13. An automated storageand retrieval system having autonomously guided rover vehicles, theautomated storage and retrieval system comprising: at least one verticallift module having at least one travel surface upon which theautonomously guided rover vehicles travel; a transfer deck incommunication with the at least one vertical lift module, the transferdeck including a transfer deck surface upon which the autonomouslyguided rover vehicles travel; and a released interface releasablyconnecting the at least one travel surface and the transfer decksurface, the released interface forming an autonomous autonomouslyguided rover vehicle riding surface extending between the at least onetravel surface and the transfer deck surface; wherein the rd easedinterface includes an interface portion connected to one of the at leastone travel surface of the transfer deck surface; and at least onemovable plate movably connected to another one of the at least onetravel surface or the transfer deck surface, the at least one moveableplate and the interface portion being configured to releasably engageone another and provide the autonomous autonomouslv guided rover vehicleriding surface.
 14. The automated storage and retrieval system of claim13, wherein the at least one vertical lift module includes a frame, anda rail mounting bracket configured to adjustably couple the at least onetravel surface to the frame.
 15. The automated storage and retrievalsystem of claim 13, wherein the at least one vertical lift modulecomprises a autonomously guided rover vehicle charging station includingcompliant contacts configured to engage the autonomously guided rovervehicles.
 16. The automated storage and retrieval system of claim 13,wherein the interface portion includes first fingers integrally formedwith the at least one travel surface or the transfer deck surface andthe at least one movable plate includes second fingers that areinterleaved with the first fingers.
 17. The automated storage andretrieval system of claim 13, wherein the interface portion comprisestwo interface portions and the at least one movable plate comprises amovable plate for releasably engaging a respective one of the twointerface portions.
 18. The automated storage and retrieval system ofclaim 13, wherein the interface portion comprises two interface portionsand the at least one movable plate comprises a single plate forreleasably engaging the two interface portions.
 19. The automatedstorage and retrieval system of claim 13, wherein the at least onemovable plate is movably coupled to the another one of the at least onetravel surface or the transfer deck surface with at least a two-degreeof freedom coupling.